The Potentium were a group of Jedi who believed the Force was inherently good... Regardless of your actions, the Force would make things right, Yoda and the rest of the Council did not believe this. Though they neither prove this wrong nor show there beliefs to be right, as 110 years later they watch there order go down in Flames lol.
Regarding my previous post: That is the real world explanation for Luke's actions on Tatooine, my view is similar to Ctrl_Alt's, the Force is the Force, how you choose to use it reflects your alignment in the eyes of the person Judging your actions.